Cita APA (7a ed.)

Wittgenstein, L. (1969). Generally known as the blue and brown books. Basil Blackwell.

Cita Chicago Style (17a ed.)

Wittgenstein, Ludwig. Generally Known as the Blue and Brown Books. Oxford: Basil Blackwell, 1969.

Cita MLA (9a ed.)

Wittgenstein, Ludwig. Generally Known as the Blue and Brown Books. Basil Blackwell, 1969.